package com.tomatozq163.structure;

public class ArrayStack<E> implements Stack<E> {
    Array<E> array;

    public ArrayStack(int capacity){
        array = new Array<>(capacity);
    }

    public ArrayStack(){
        array = new Array<>();
    }

    @Override
    public void push(E e) {
        array.addLast(e);
    }

    @Override
    public E pop() {
        return array.removeLast();
    }

    @Override
    public E peek() {
        return array.getLast();
    }

    @Override
    public int getSize() {
        return array.getSize();
    }

    @Override
    public boolean isEmpty() {
        return array.isEmpty();
    }

    public int getCapacity(){
        return array.getCapacity();
    }

    @Override
    public String toString() {
        StringBuilder res = new StringBuilder();

        res.append("Stack:");
        res.append("[");

        for (int i = 0; i < array.getSize(); i++) {
            res.append(array.get(i));

            if (i!=array.getSize() - 1)
                res.append(",");
        }

        res.append("] top");

        return res.toString();
    }

    public static void main(String[] args){
        ArrayStack<Integer> stack = new ArrayStack<>();

        for (int i = 0; i < 5; i++) {
            stack.push(i);
        }

        System.out.println(stack);

        stack.pop();
        System.out.println(stack);
    }
}
